"I would think: Stay close to the implants! They must know something because they keep getting asked backstage!"

This quote by Moon Unit Zappa is most likely referring to the concept that people need to take note of those who are successful and have actually attained their goals. The "implants" she is describing might be analyzed as people who have attained success in their respective fields. By remaining close to these individuals, one can learn from their experiences and get insight into how to achieve success. This quote could also be translated as a suggestion to take notice of those who are asked backstage, as they should have something unique that has made them the attention of others. This could be a skill, knowledge, and even a specific attitude that has actually made them stand apart from the crowd. Ultimately, this quote is a reminder to pay attention to those who have actually attained success and to gain from their experiences.